The PDT activity of free and pegylated pheophorbide a against an amelanotic melanoma transplanted in C57/BL6 mice.
Invest New Drugs
; 31(1): 192-9, 2013 Feb.
Article
em En
| MEDLINE
| ID: mdl-22688292
ABSTRACT
Pheophorbide a (Pba) is a chlorophyll catabolite that has been proposed as photosensitizer in photodynamic therapy. In a previous study we conjugated Pba to monomethoxy-polyethylene glycol (mPEG-Pba), to increase its solubility and pharmacokinetics. Here, we compare the photodynamic therapy efficacy of free Pba and mPEG-Pba to cure a subcutaneous amelanotic melanoma transplanted in C57/BL6 mice. The photosensitizers, i.p. injected (30 mg/kg), showed no toxicity when the animals were kept in the dark. But, after photoactivation with a 660 nm laser (fluence of 193 J/cm(2)), both photosensitizers, in particular mPEG-Pba, showed a strong efficacy to cure the tumor, both in terms of tumor growth delay and increase of Kaplan-Meier median survival time. Together, our in vivo data demonstrate that mPEG-conjugated Pba is a promising photosensitizer for the photodynamic therapy of cancer.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Polietilenoglicóis
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Radiossensibilizantes
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Clorofila
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Melanoma Amelanótico
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article